Carrier 58MVB, 58MTB, 58MCB manual Safety Considerations, These safety rules

SAFETY CONSIDERATIONS

Recognize safety information. This is the safety-alert sym- bol ! . When you see this symbol on the furnace and in instructions or manuals, be alert to the potential for personal injury.

Understand the signal words—DANGER, WARNING, CAUTION and NOTE. DANGER, WARNING and CAUTION are used with the safety-alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which may result in minor per- sonal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced instal- lation, reliability or operation.

To minimize the possibility of serious personal injury, fire, furnace damage, or improper operation; carefully follow

these safety rules:

•Your new gas furnace may have been installed in 1 of 2 ways, as a direct-vent (2-pipe) application or as a non-direct vent (1-pipe) application.

•In a direct-vent (2-pipe) application, your furnace uses air from outside the home for combustion and vents flue gas to the outdoors. This type of application will have 2 pipes run- ning from the furnace to the outdoors. (See Fig. 5.) In this application, the vent and air-intake pipes must terminate out- side the structure and must not be obstructed in any way. Do not block or obstruct air openings on furnace or spaces around furnace.

6

•Keep the area around your furnace clear and free of com- bustible materials, gasoline, and other flammable liquids and vapors.

5

•In a non-direct vent (1-pipe) application, your furnace uses air from adjacent to the furnace for combustion and vents flue gas to the outdoors. This type of application will have only 1 pipe running from the furnace to the outdoors. (See Fig. 6) The other pipe will terminate in the same space as the furnace and is the source of combustion air for your furnace. There- fore, the furnace must not be enclosed in an airtight room or be sealed behind solid doors. It must have adequate airflow for efficient combustion and safe ventilation. Do not obstruct the combustion-air pipe in any way. The vent pipe must ter- minate outside the structure and must not be obstructed in any way. Do not block or obstruct air openings or space around furnace.

7

•Do not cover the furnace, store trash or debris near it, or in any way block the flow of fresh air to the unit.

In addition to the safety rules above, make sure that the fol- lowing combustion-air requirements are met for non-direct vent applications.

•Combustion air must be clean and uncontaminated with chlorine or fluorine. These compounds are present in many products around the home, such as water softener salts, laun- dry bleaches, detergents, adhesives, paints, varnishes, paint strippers, and plastics.

•Make sure the combustion air for your furnace does not con- tain any of these compounds. During remodeling be sure the combustion air is fresh and uncontaminated. If these compounds are burned in your furnace, the heat exchangers may deteriorate.

•A furnace installed in an attic or other insulated space must be kept free and clear of insulating material. Examine the fur- nace area when the furnace is installed or when insulation is added. Some materials may be combustible.

•Should the gas supply fail to shut off or if overheating occurs, shut off the gas valve to the furnace before shutting off electrical supply.

This furnace contains SAFETY DEVICES which must be MANUALLY RESET. If the furnace is left unattended for an extended period of time, have it checked periodically for proper operation. This precaution will prevent problems associated with no heat, such as frozen water pipes, etc. See “Before You Request a Service Call’’ section in this manual.

4